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ATtiny261-ESSZ Scheda tecnica(PDF) 179 Page - ATMEL Corporation

Il numero della parte ATtiny261-ESSZ
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  227 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny261-ESSZ Scheda tecnica(HTML) 179 Page - ATMEL Corporation

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179
7753C–AVR–07/09
ATtiny261/ATtiny461/ATtiny861
Figure 22-3. Programming the Flash Waveforms(1)
Note:
1. “XX” is don’t care. The letters refer to the programming description above.
22.8.5
Programming the EEPROM
The EEPROM is organized in pages, see Table 22-8 on page 174. When programming the
EEPROM, the program data is latched into a page buffer. This allows one page of data to be
programmed simultaneously. The programming algorithm for the EEPROM data memory is as
follows (refer to “Programming the Flash” on page 177 for details on Command, Address and
Data loading):
1.
A: Load Command “0001 0001”.
2.
G: Load Address High Byte (0x00 - 0xFF).
3.
B: Load Address Low Byte (0x00 - 0xFF).
4.
C: Load Data (0x00 - 0xFF).
5.
E: Latch data (give PAGEL a positive pulse).
K: Repeat 3 through 5 until the entire buffer is filled.
L: Program EEPROM page
1.
Set BS to “0”.
2.
Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY
goes low.
3.
Wait until to RDY/BSY goes high before programming the next page (See Figure 22-4 for
signal waveforms).
RDY/BSY
WR
OE
RESET +12V
0x10
ADDR. LOW
ADDR. HIGH
DATA
DATA LOW
DATA HIGH
ADDR. LOW
DATA LOW
DATA HIGH
XA1/BS2
XA0
PAGEL/BS1
XTAL1
XX
XX
XX
AB
CD
E
B
C
D
E
G
H
F



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